To use a background worker class in C#

1- Create an Instance of Background Class

 BackgroundWorker bgw=new BackgroundWorker();

2- Create an event handler for the background worker's DoWork event

private void backgroundWorker_DoWork(object sender, DoWorkEventArgs e)
    {
          for (int i = 0; i < dtCustomer.Rows.Count; i++)
       {

             customerName1 = Convert.ToString(dtCustomer.Rows[i][CName]);
             CFatherName1 =Convert.ToString(dtCustomer.Rows[i][CFatherName]);
            InsertItems(customerName1, CFatherName1);
            sucesscustomeritem += 1;
       }

    }

3- Create an event handler for the background worker's ProgressChanged event

private void backgroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
txtItemsAdded.Text = txtItemsAdded.Text + "\n" + Convert.ToString(sucesscustomeritem) + " records      inserted into the database...";
}

4- Create an event handler for the RunWorkerCompleted event.

private void backgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
 txtItemsAdded.Text = txtItemsAdded.Text + "\n" + Convert.ToString(sucesscustomeritem) + " records  inserted into the database...";

dispatcherTimer.Stop();

MessageBox.Show("Records Inserted Succeessfully");

}

5- Add the event handlers to the BackgroundWorker instance's events.

bgw.DoWork += new System.ComponentModel.DoWorkEventHandler(this.backgroundWorkerDoWork);
bgw.ProgressChanged += new System.ComponentModel.ProgressChangedEventHandler(this.backgroundWorkerProgressChanged);
bgw.RunWorkerCompleted += new System.ComponentModel.RunWorkerCompletedEventHandler(this.backgroundWorker_RunWorkerCompleted);

6- Start running the background operation by calling the RunWorkerAsync method.

private void btnMap_Click(object sender, RoutedEventArgs e)

 {
    bgw.RunWorkerAsync();
 }